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m in (-oo:+oo)
((39-(13*m))^5)/13 = 0
((39-13*m)^5)/13 = 0
39-13*m = 0 // - 39
-13*m = -39 // : -13
m = -39/(-13)
m = 3
m in { 3, 3, 3, 3, 3 }
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